JPS5953003A - Ac/dc conversion station - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to an AC/DC converter station that constitutes a super-convex voltage DC transmission system, and particularly relates to the AC/DC converter station. This is related to the composition.

[Technical Background of the Invention] Conventional AC/DC converter stations have a 1:1"a arrangement α configuration based on air insulation. However, in recent years, electric power systems have been trending towards high power When transmitting electricity (to a remote location), there is a problem with the transmission voltage of DC as well as AC, and AC/DC conversion stations of ±250KV class have already been constructed. 10
For 10000 class power transmission, Ul-I is used in AC systems.
V (ultra high voltage) class is essential. When it comes to tJ IV class, the width space under the line of the transmission railway J Ha will be reduced from the viewpoint of maintenance, Ihj 3 people 41 site space. Therefore,
In the case of the same 10100O0 DC power transmission, ±50'O
500K AC as the KV class has sufficient power transmission capacity.
There are 41 DC ±500K V power transmission systems on the right that can be handled with V-level insulation.

However, as mentioned above, the conventional conversion station is 1250KV
If we were to install a conversion station of 0 OKv class, the site for the conversion station would be enormous.

Furthermore, when an insulator is applied with a current of 1r1, its withstand voltage performance tends to decrease due to the presence of impurities in the air. Compared to the case, it requires shishing insulation. .

C1 Naturally, it is possible to adopt gas insulation systems for switchgear from the perspective of reducing tree cover on the site. However, even if only the installation space for opening and closing is reduced (), the entire conversion station is closed (
If you look at it, it's not that much of a reduction. Therefore, it is effective to connect each device using a gas-insulated bus bar.

Also, note that the DC side of the AC i+'i converter station is composed of the positive IIi wire, the inflexible wire, and the Ill (!l polar wire), and connect the above three wires together into a gas-insulated conduit f(1N+dos''). (It is desirable to configure a Cas-insulated AC/DC conversion station.

An example of a cass insulation AC 11j converter station to which such technology is applied is shown in FIGS. 1 and 2.

First, Fig. 1 is a middle line connection diagram, in which the AC side electric line 1 is connected to Hatake 1'' stage conversion converter 1!/! device 2a and low voltage stage conversion converter 21). , further connected to the high pressure stage thyristor valve 3a and the (LC/:i stage zyristor valve 3b), respectively.
kJ, connected in series as shown in Figure 1, the August side is the positive electrode wire, and the low voltage side is f! l polar line, -1-recorded high/low tansu-
The connecting parts of the Iristahalbu 3a and 3b are connected to the external electric line of the interchange station 1 converter station as a middle curve.
b is connected to the pillow, lightning arresters 5a, 51+, (3
a, C3b, voltage transformers 7a, 7b.

7c, DC filter Ba, 6b, current transformer 9a.

911, 9c, disconnector 10a, 10b, 10c
,, lightning arresters 11a, 11b, 11c and single flow bushings 12a, 12b, 12c are connected.

The arrangement of each device in the AC/DC switching station shown in Fig. 1 is as follows: the high voltage stage conversion transformer 2a, the two stage thyristor valve 3a, the low voltage stage conversion transformer 2b and the low voltage stage 1, the iris thyristor valve 31). Each - each combined, these combinations 1! but,
They are arranged in parallel so that the Zyristor valves face the same direction. From the side opposite to the conversion converters 2a, 2b of each Zyrister valve 3a, 3b, LL, positive (~11W; (2
1 and square rod ↑ (1 line 22 is pulled out, J, Tabata pressure stage - iris valve 3a and low pressure stage iris iris valve 311
Inside 1'1. A neutral wire 23 is drawn out from +t',j. The iE polarity line 2'1 and the negative polarity line 22 have direct current flowing through them.

41) and escape device ba, 5t), 5a,
(31 pins are available and connected.

These positive polarity Nil 21 , negative polarity wire 22 and neutral wire 23 are connected to a third wire extending parallel to the direction in which they are drawn out.
3-wire gas insulated pipe bus 2 with lυi and right σ as shown in the figure
4, and on the left and right sides of this conduit busbar 24, electric current is connected to
Transformer 78.713, DC router F3a.

81) are arranged and connected. Through the positive electrode +71 wire 25, negative polarity wire 2G and neutral wire 27 drawn out from the end of the 3-wire gas insulated pipe/line 83 wire 2/l,
The AC/DC converter station is connected to an external direct f7fE electric line.

However, in a gas-insulated AC/DC converter station that uses this excellent configuration, 3) Bulk gas insulation?To route 1Nj line 2
4 is the converter transformer 2a, 2b and the transformer hub 3a
, 31) is extended in the arrangement direction with -C, so the configuration (
The installation area of firearms has become larger, and J: I! Since the Tj current is 1 to 4b, the cass insulated busbar on the DC side is also long, and the production cost is also high. In particular, recently, AC/DC converter stations have been increasingly being built in mountainous areas due to a lack of land near cities.
Ichikawa (・It became difficult to maintain the long site (I),
This was causing problems in the construction of an AC/DC converter station.

[Object of the Invention] The present invention has been made in view of the above points, and its purpose is to reduce the installation area of component equipment, reduce the length of the gas-insulated bus bar on the DC side, and to reduce the length of the AC/DC converter station. It's about providing.

[11il Requirements of the Invention] The AC/DC converter station of the present invention includes a high voltage stage and a low stage. [Arrange the replacement transformer and silice valve of each set of the first stage in the IL row,
→J゛-(Collect the positive polarity wire, 0 polarity wire, and the neutral wire of the neutral conductor insulated 1U wire coming out from the DC side of the risk valve at the end of the risk valve, and connect it to the conversion transformer. I decided to connect it to the 3-wire bulk gas insulated conduit fl line arranged in the direction perpendicular to the arrangement direction of the iristor valves.
The layout area of the AC/DC converter station's components is reduced, and the length of the 11 three-layer gas-insulated pipelines is shortened.

1. Examples of the invention” An embodiment of the present invention will be described below with reference to FIG.

, J3, the same parts as the conventional type shown in FIGS. 1 and 2 are indicated by the same symbol E.

Figure 4 shows d3 (high/low pressure stage 4 Neuristor valve 38).
．． 3bO) From the upstream side, tTh 14i 1! 1
21, a negative polarity wire 22, and a neutral wire 23 are drawn out, and these are collected at the bottom of the high pressure stage r risk valve 3a. On the other hand, on the direct current side of the iris valves 3a, 3b, there is a 3.
A line bundle gas insulated conduit busbar 34 is arranged. Then this 31! +l base end of the bulk gas insulated conduit busbar 34;
The positive polarity wire 21, the negative polarity wire 22, the neutral wire 23, etc.
The single-wire gas-insulated busbars 31, 32, and 33 are bent into a single-wire shape and connected by insulated busbars 31, 32, and 33.
l I', it, bus line 31 of positive polarity line and negative polarity line
．． 32 and J34J, the 3-wire bulk gas insulated line busbar 34 is connected to the pipe sections extending in the same direction (DC reactors 1 to 4a,
41+ and lightning arrester 5a.

511.6a and 6b are arranged. In addition, voltage transformers 7 are installed on both sides of the 3-wire gas-insulated conduit busbar 34.
a, 7b and DC filters 8a, Qb are metered and connected. Furthermore, this 3-wire collective gas insulated line bus 34 is connected to the free current electrical circuit outside the C1 AC/DC converter station by passing the positive polarity wire 25, negative polarity wire 26, and neutral wire 27 drawn out from the terminal 1) of A. connected to.

It is configured like this: 1. : In the AC/N converter station a3 of the present invention, the 3-wire collective gas insulated conduit busbar 3'l intersects 1°J with the array lb direction of the conversion transformers 2a, 21 + 3a, 3b. (Since the installation surface is installed, each firearm arrangement direction is bent into a 1-shape shape and (2), the overall length can be made as long as 1. Therefore, the installation area of the component equipment of the exchange station is also reduced. Therefore, even if it is difficult to secure a large site due to this restriction, it is possible to construct an AC/DC converter station.
Since b is placed in the upper part of the line, the length of the 3-wire bulk gas insulated conduit busbar 34 can be further shortened, and the manufacturing cost can be reduced by 1~.

It should be noted that the present invention is not limited to the embodiment shown in (E) and (E). , -B low-pressure stage Zyristor valve 31, gathered at the + end, from here to 1- shape Ii! Connect to the 3-wire collective gas-insulated conduit busbar 34 via the I-bent single-wire gas-insulated 1ζ1FAI.

[Effect of the invention 1 As mentioned above, if the present invention has J, 1m?S? By reducing the installation area of the device and shortening the quality of the DC side insulated 81 wires, the AC/DC converter station can be reduced to 1J? I can provide it.

[Brief explanation of the drawing]

Figure 1 is a single-item wiring diagram of an AC/DC converter station, Figure 12 is a plan view of a general equipment arrangement based on the 11-line wiring diagram in Figure 1, and Figure 3 is a three-wire bulk insulation circuit. A sectional view of the line IIl, and FIG. 4 is a plan view showing an embodiment of the AC/DC converter station of the present invention. 21)...Low pressure stage conversion transformer, 3a...High pressure stage relay valve, 3b...Low pressure stage 4 Neuristor valve, 4a, 4b-DC reactor 1~le, 5"
+ 51+, 6a, 6b-... Lightning arrester, 7a, 71
3, 7C--Mold transformer, 8a, 8b...DC filter, 9a. 9b, 9cm...Current transformer, 10a, 10b, 1
0 C-1ai road device, 11a, 1 lb, 11c
mjjl lightning device, 2'1...Positive polarity wire, 22...Negative polarity wire, 23...Neutral wire, 24...3-wire bulk gas insulated conduit fJj♀51), 25... Positive polarity line, 26...
Negative polarity wire, 27 neutral wire, 31... Single wire gas insulated positive polarity wire J wire, 32... Single wire gas insulated negative polarity wire 1
u wire, 33...neutral wire single wire gas insulated 1 (1 wire, 3'
l...3 embryos) Bulk gas insulation line 1'' line. Applicant Tokyo Shibaura Electric Co., Ltd. 71 Figure 2 Figure 3 17-1

Claims (2)

[Claims] (1) In an AC/DC converter station where a high pressure Bj relay valve and a low pressure stage relay valve are connected in series, a converter for converting a high voltage stage, a high H single stage valve, a transformer for converting a low voltage stage and a low voltage stage relay valve With the valve,
The irristor valves in each stage are arranged in parallel so that they face the same direction, and the positive polarity line, negative 147 t'l line and neutral line, which are derived from the DC side of the iristor valve, are connected to the high t
t (1 of any stage) - Collect the positive electrode 1!1 wire, f''l pole 1'l Iil, and neutral wire at the end of the iris valve, and make a single wire broken bus line bent into a 1-shape. An AC/DC converter station characterized in that three wires of the three wires are connected to the gas-insulated T1 bus line in a direction orthogonal to the arrangement direction of the conversion power n: device Lee Iristabal-f. (2) A DC reactor is installed in the conduit section where the ψ wire cass insulation bus of the positive polarity gland and the square polarity wire extends in the same direction as the path bus to the 33-wire bulk gas insulation t. An AC/DC variable 1β location according to claim 1.